resource/csdk/connectivity/src/camessagehandler.c

   1 /* *****************************************************************
   2  *
   3  * Copyright 2014 Samsung Electronics All Rights Reserved.
   4  *
   5  *
   6  *
   7  * Licensed under the Apache License, Version 2.0 (the "License");
   8  * you may not use this file except in compliance with the License.
   9  * You may obtain a copy of the License at
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  13  * Unless required by applicable law or agreed to in writing, software
  14  * distributed under the License is distributed on an "AS IS" BASIS,
  15  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  16  * See the License for the specific language governing permissions and
  17  * limitations under the License.
  18  *
  19  ******************************************************************/
  20
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <stdint.h>
  25
  26 #include "cainterface.h"
  27 #include "camessagehandler.h"
  28 #include "caremotehandler.h"
  29 #include "caprotocolmessage.h"
  30 #include "logger.h"
  31 #ifndef WITH_UPSTREAM_LIBCOAP
  32 #include "coap/config.h"
  33 #endif
  34 #include "oic_malloc.h"
  35 #include "canetworkconfigurator.h"
  36 #include "caadapterutils.h"
  37 #include "cainterfacecontroller.h"
  38 #include "caretransmission.h"
  39 #include "oic_string.h"
  40
  41 #ifdef WITH_BWT
  42 #include "cablockwisetransfer.h"
  43 #endif
  44
  45 #ifndef  SINGLE_THREAD
  46 #include "uqueue.h"
  47 #include "cathreadpool.h" /* for thread pool */
  48 #include "caqueueingthread.h"
  49
  50 #define SINGLE_HANDLE
  51 #define MAX_THREAD_POOL_SIZE    20
  52
  53 // thread pool handle
  54 static ca_thread_pool_t g_threadPoolHandle = NULL;
  55
  56 // message handler main thread
  57 static CAQueueingThread_t g_sendThread;
  58 static CAQueueingThread_t g_receiveThread;
  59
  60 #else
  61 #define CA_MAX_RT_ARRAY_SIZE    3
  62 #endif  // SINGLE_THREAD
  63
  64 #define TAG "OIC_CA_MSG_HANDLE"
  65
  66 static CARetransmission_t g_retransmissionContext;
  67
  68 // handler field
  69 static CARequestCallback g_requestHandler = NULL;
  70 static CAResponseCallback g_responseHandler = NULL;
  71 static CAErrorCallback g_errorHandler = NULL;
  72 static CANetworkMonitorCallback g_nwMonitorHandler = NULL;
  73
  74 static void CAErrorHandler(const CAEndpoint_t *endpoint,
  75                            const void *data, uint32_t dataLen,
  76                            CAResult_t result);
  77
  78 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
  79                                        const CARemoteId_t *identity,
  80                                        const void *data, CADataType_t dataType);
  81
  82 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info,
  83                             CAResult_t result);
  84
  85 #ifdef SINGLE_THREAD
  86 static void CAProcessReceivedData(CAData_t *data);
  87 #endif
  88 static void CADestroyData(void *data, uint32_t size);
  89 static void CALogPayloadInfo(CAInfo_t *info);
  90 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *endpoint, uint16_t id,
  91                                 CAToken_t token, uint8_t tokenLength);
  92
  93 #ifdef WITH_BWT
  94 void CAAddDataToSendThread(CAData_t *data)
  95 {
  96     VERIFY_NON_NULL_VOID(data, TAG, "data");
  97
  98     // add thread
  99     CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
 100 }
 101
 102 void CAAddDataToReceiveThread(CAData_t *data)
 103 {
 104     VERIFY_NON_NULL_VOID(data, TAG, "data");
 105
 106     // add thread
 107     CAQueueingThreadAddData(&g_receiveThread, data, sizeof(CAData_t));
 108 }
 109 #endif
 110
 111 static bool CAIsSelectedNetworkAvailable()
 112 {
 113     u_arraylist_t *list = CAGetSelectedNetworkList();
 114     if (!list || u_arraylist_length(list) == 0)
 115     {
 116         OIC_LOG(ERROR, TAG, "No selected network");
 117         return false;
 118     }
 119
 120     return true;
 121 }
 122
 123 static CAData_t* CAGenerateHandlerData(const CAEndpoint_t *endpoint,
 124                                        const CARemoteId_t *identity,
 125                                        const void *data, CADataType_t dataType)
 126 {
 127     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData IN");
 128     CAInfo_t *info = NULL;
 129     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 130     if (!cadata)
 131     {
 132         OIC_LOG(ERROR, TAG, "memory allocation failed");
 133         return NULL;
 134     }
 135 #ifdef SINGLE_THREAD
 136     CAEndpoint_t* ep = endpoint;
 137 #else
 138     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 139     if (!ep)
 140     {
 141         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 142         goto exit;
 143     }
 144 #endif
 145
 146     OIC_LOG_V(DEBUG, TAG, "address : %s", ep->addr);
 147
 148     if (CA_RESPONSE_DATA == dataType)
 149     {
 150         CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 151         if (!resInfo)
 152         {
 153             OIC_LOG(ERROR, TAG, "memory allocation failed");
 154             goto exit;
 155         }
 156
 157         CAResult_t result = CAGetResponseInfoFromPDU(data, resInfo, endpoint);
 158         if (CA_STATUS_OK != result)
 159         {
 160             OIC_LOG(ERROR, TAG, "CAGetResponseInfoFromPDU Failed");
 161             CADestroyResponseInfoInternal(resInfo);
 162             goto exit;
 163         }
 164         cadata->responseInfo = resInfo;
 165         info = &resInfo->info;
 166         if (identity)
 167         {
 168             info->identity = *identity;
 169         }
 170         OIC_LOG(DEBUG, TAG, "Response Info :");
 171         CALogPayloadInfo(info);
 172     }
 173     else if (CA_REQUEST_DATA == dataType)
 174     {
 175         CARequestInfo_t* reqInfo = (CARequestInfo_t*)OICCalloc(1, sizeof(CARequestInfo_t));
 176         if (!reqInfo)
 177         {
 178             OIC_LOG(ERROR, TAG, "memory allocation failed");
 179             goto exit;
 180         }
 181
 182         CAResult_t result = CAGetRequestInfoFromPDU(data, endpoint, reqInfo);
 183         if (CA_STATUS_OK != result)
 184         {
 185             OIC_LOG(ERROR, TAG, "CAGetRequestInfoFromPDU failed");
 186             CADestroyRequestInfoInternal(reqInfo);
 187             goto exit;
 188         }
 189
 190         if (CADropSecondMessage(&caglobals.ca.requestHistory, endpoint, reqInfo->info.messageId,
 191                                 reqInfo->info.token, reqInfo->info.tokenLength))
 192         {
 193             OIC_LOG(ERROR, TAG, "Second Request with same Token, Drop it");
 194             CADestroyRequestInfoInternal(reqInfo);
 195             goto exit;
 196         }
 197
 198         cadata->requestInfo = reqInfo;
 199         info = &reqInfo->info;
 200         if (identity)
 201         {
 202             info->identity = *identity;
 203         }
 204         OIC_LOG(DEBUG, TAG, "Request Info :");
 205         CALogPayloadInfo(info);
 206    }
 207     else if (CA_ERROR_DATA == dataType)
 208     {
 209         CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
 210         if (!errorInfo)
 211         {
 212             OIC_LOG(ERROR, TAG, "Memory allocation failed!");
 213             goto exit;
 214         }
 215
 216         CAResult_t result = CAGetErrorInfoFromPDU(data, endpoint, errorInfo);
 217         if (CA_STATUS_OK != result)
 218         {
 219             OIC_LOG(ERROR, TAG, "CAGetErrorInfoFromPDU failed");
 220             OICFree(errorInfo);
 221             goto exit;
 222         }
 223
 224         cadata->errorInfo = errorInfo;
 225         info = &errorInfo->info;
 226         if (identity)
 227         {
 228             info->identity = *identity;
 229         }
 230         OIC_LOG(DEBUG, TAG, "error Info :");
 231         CALogPayloadInfo(info);
 232     }
 233
 234     cadata->remoteEndpoint = ep;
 235     cadata->dataType = dataType;
 236
 237     OIC_LOG(DEBUG, TAG, "CAGenerateHandlerData OUT");
 238     return cadata;
 239
 240 exit:
 241     OICFree(cadata);
 242 #ifndef SINGLE_THREAD
 243     CAFreeEndpoint(ep);
 244 #endif
 245     return NULL;
 246 }
 247
 248 static void CATimeoutCallback(const CAEndpoint_t *endpoint, const void *pdu, uint32_t size)
 249 {
 250     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
 251     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
 252 #ifdef SINGLE_THREAD
 253     CAEndpoint_t* ep = endpoint;
 254 #else
 255     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 256     if (!ep)
 257     {
 258         OIC_LOG(ERROR, TAG, "clone failed");
 259         return;
 260     }
 261 #endif
 262
 263     CAResponseInfo_t* resInfo = (CAResponseInfo_t*)OICCalloc(1, sizeof(CAResponseInfo_t));
 264
 265     if (!resInfo)
 266     {
 267         OIC_LOG(ERROR, TAG, "calloc failed");
 268 #ifndef SINGLE_THREAD
 269         CAFreeEndpoint(ep);
 270 #endif
 271         return;
 272     }
 273
 274     resInfo->result = CA_RETRANSMIT_TIMEOUT;
 275     resInfo->info.type = CAGetMessageTypeFromPduBinaryData(pdu, size);
 276     resInfo->info.messageId = CAGetMessageIdFromPduBinaryData(pdu, size);
 277
 278     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_transport_t *) pdu, &(resInfo->info),
 279                                        endpoint);
 280     if (CA_STATUS_OK != res)
 281     {
 282         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 283         CADestroyResponseInfoInternal(resInfo);
 284 #ifndef SINGLE_THREAD
 285         CAFreeEndpoint(ep);
 286 #endif
 287         return;
 288     }
 289
 290     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 291     if (NULL == cadata)
 292     {
 293         OIC_LOG(ERROR, TAG, "memory allocation failed !");
 294 #ifndef SINGLE_THREAD
 295         CAFreeEndpoint(ep);
 296 #endif
 297         CADestroyResponseInfoInternal(resInfo);
 298         return;
 299     }
 300
 301     cadata->type = SEND_TYPE_UNICAST;
 302     cadata->remoteEndpoint = ep;
 303     cadata->requestInfo = NULL;
 304     cadata->responseInfo = resInfo;
 305
 306 #ifdef WITH_BWT
 307     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 308     {
 309         res = CARemoveBlockDataFromListWithSeed(resInfo->info.token, resInfo->info.tokenLength,
 310                                                 endpoint->port);
 311         if (CA_STATUS_OK != res)
 312         {
 313             OIC_LOG(ERROR, TAG, "CARemoveBlockDataFromListWithSeed failed");
 314         }
 315     }
 316 #endif // WITH_BWT
 317
 318 #ifdef SINGLE_THREAD
 319     CAProcessReceivedData(cadata);
 320 #else
 321     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 322 #endif
 323 }
 324
 325 static void CADestroyData(void *data, uint32_t size)
 326 {
 327     OIC_LOG(DEBUG, TAG, "CADestroyData IN");
 328     if ((size_t)size < sizeof(CAData_t))
 329     {
 330         OIC_LOG_V(ERROR, TAG, "Destroy data too small %p %d", data, size);
 331     }
 332     CAData_t *cadata = (CAData_t *) data;
 333
 334     if (NULL == cadata)
 335     {
 336         OIC_LOG(ERROR, TAG, "cadata is NULL");
 337         return;
 338     }
 339 #ifndef SINGLE_THREAD
 340     if (NULL != cadata->remoteEndpoint)
 341     {
 342         CAFreeEndpoint(cadata->remoteEndpoint);
 343     }
 344 #endif
 345
 346     if (NULL != cadata->requestInfo)
 347     {
 348         CADestroyRequestInfoInternal((CARequestInfo_t *) cadata->requestInfo);
 349     }
 350
 351     if (NULL != cadata->responseInfo)
 352     {
 353         CADestroyResponseInfoInternal((CAResponseInfo_t *) cadata->responseInfo);
 354     }
 355
 356     if (NULL != cadata->errorInfo)
 357     {
 358         CADestroyErrorInfoInternal(cadata->errorInfo);
 359     }
 360
 361     OICFree(cadata);
 362     OIC_LOG(DEBUG, TAG, "CADestroyData OUT");
 363 }
 364
 365 #ifdef SINGLE_THREAD
 366 static void CAProcessReceivedData(CAData_t *data)
 367 {
 368     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData IN");
 369     if (!data)
 370     {
 371         OIC_LOG(ERROR, TAG, "thread data error!!");
 372         return;
 373     }
 374
 375     // parse the data and call the callbacks.
 376     // #1 parse the data
 377     // #2 get endpoint
 378     CAEndpoint_t *rep = (CAEndpoint_t *)(data->remoteEndpoint);
 379     if (!rep)
 380     {
 381         OIC_LOG(ERROR, TAG, "remoteEndpoint error!!");
 382         return;
 383     }
 384
 385     if (data->requestInfo && g_requestHandler)
 386     {
 387         g_requestHandler(rep, data->requestInfo);
 388     }
 389     else if (data->responseInfo && g_responseHandler)
 390     {
 391         g_responseHandler(rep, data->responseInfo);
 392     }
 393     else if (data->errorInfo && g_errorHandler)
 394     {
 395         g_errorHandler(rep, data->errorInfo);
 396     }
 397
 398     CADestroyData(data, sizeof(CAData_t));
 399
 400     OIC_LOG(DEBUG, TAG, "CAProcessReceivedData OUT");
 401 }
 402 #endif
 403
 404 #ifndef SINGLE_THREAD
 405 static void CAReceiveThreadProcess(void *threadData)
 406 {
 407 #ifndef SINGLE_HANDLE
 408     CAData_t *data = (CAData_t *) threadData;
 409     CAProcessReceivedData(data);
 410 #else
 411     (void)threadData;
 412 #endif
 413 }
 414 #endif // SINGLE_THREAD
 415
 416 static CAResult_t CAProcessMulticastData(const CAData_t *data)
 417 {
 418     VERIFY_NON_NULL(data, TAG, "data");
 419     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 420
 421     coap_pdu_t *pdu = NULL;
 422     CAInfo_t *info = NULL;
 423     coap_list_t *options = NULL;
 424     coap_transport_t transport = COAP_UDP;
 425     CAResult_t res = CA_SEND_FAILED;
 426
 427     if (!data->requestInfo && !data->responseInfo)
 428     {
 429         OIC_LOG(ERROR, TAG, "request or response info is empty");
 430         return res;
 431     }
 432
 433     if (data->requestInfo)
 434     {
 435         OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 436
 437         info = &data->requestInfo->info;
 438         pdu = CAGeneratePDU(CA_GET, info, data->remoteEndpoint, &options, &transport);
 439     }
 440     else if (data->responseInfo)
 441     {
 442         OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 443
 444         info = &data->responseInfo->info;
 445         pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 446                             &options, &transport);
 447     }
 448
 449     if (!pdu)
 450     {
 451         OIC_LOG(ERROR,TAG,"Failed to generate multicast PDU");
 452         CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 453         coap_delete_list(options);
 454         return res;
 455     }
 456
 457 #ifdef WITH_BWT
 458     if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 459     {
 460         // Blockwise transfer
 461         res = CAAddBlockOption(&pdu, info, data->remoteEndpoint, &options);
 462         if (CA_STATUS_OK != res)
 463         {
 464             OIC_LOG(DEBUG, TAG, "CAAddBlockOption has failed");
 465             goto exit;
 466         }
 467     }
 468 #endif // WITH_BWT
 469
 470     CALogPDUInfo(pdu, data->remoteEndpoint);
 471
 472     OIC_LOG(DEBUG, TAG, "pdu to send :");
 473     OIC_LOG_BUFFER(DEBUG, TAG,  (uint8_t*)pdu->transport_hdr, pdu->length);
 474
 475     res = CASendMulticastData(data->remoteEndpoint, pdu->transport_hdr, pdu->length, data->dataType);
 476     if (CA_STATUS_OK != res)
 477     {
 478         OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 479         goto exit;
 480     }
 481
 482     coap_delete_list(options);
 483     coap_delete_pdu(pdu);
 484     return res;
 485
 486 exit:
 487     CAErrorHandler(data->remoteEndpoint, pdu->transport_hdr, pdu->length, res);
 488     coap_delete_list(options);
 489     coap_delete_pdu(pdu);
 490     return res;
 491 }
 492
 493 static CAResult_t CAProcessSendData(const CAData_t *data)
 494 {
 495     VERIFY_NON_NULL(data, TAG, "data");
 496     VERIFY_NON_NULL(data->remoteEndpoint, TAG, "remoteEndpoint");
 497
 498     CAResult_t res = CA_STATUS_FAILED;
 499
 500     CASendDataType_t type = data->type;
 501
 502     coap_pdu_t *pdu = NULL;
 503     CAInfo_t *info = NULL;
 504     coap_list_t *options = NULL;
 505     coap_transport_t transport = COAP_UDP;
 506
 507     if (SEND_TYPE_UNICAST == type)
 508     {
 509         OIC_LOG(DEBUG,TAG,"Unicast message");
 510
 511 #ifdef ROUTING_GATEWAY
 512         /*
 513          * When forwarding a packet, do not attempt retransmission as its the responsibility of
 514          * packet originator node
 515          */
 516         bool skipRetransmission = false;
 517 #endif
 518
 519         if (NULL != data->requestInfo)
 520         {
 521             OIC_LOG(DEBUG, TAG, "requestInfo is available..");
 522
 523             info = &data->requestInfo->info;
 524 #ifdef ROUTING_GATEWAY
 525             skipRetransmission = data->requestInfo->info.skipRetransmission;
 526 #endif
 527             pdu = CAGeneratePDU(data->requestInfo->method, info, data->remoteEndpoint,
 528                                 &options, &transport);
 529         }
 530         else if (NULL != data->responseInfo)
 531         {
 532             OIC_LOG(DEBUG, TAG, "responseInfo is available..");
 533
 534             info = &data->responseInfo->info;
 535 #ifdef ROUTING_GATEWAY
 536             skipRetransmission = data->responseInfo->info.skipRetransmission;
 537 #endif
 538             pdu = CAGeneratePDU(data->responseInfo->result, info, data->remoteEndpoint,
 539                                 &options, &transport);
 540         }
 541         else
 542         {
 543             OIC_LOG(DEBUG, TAG, "request info, response info is empty");
 544             return CA_STATUS_INVALID_PARAM;
 545         }
 546
 547         // interface controller function call.
 548         if (NULL != pdu)
 549         {
 550 #ifdef WITH_BWT
 551             if (CAIsSupportedBlockwiseTransfer(data->remoteEndpoint->adapter))
 552             {
 553                 // Blockwise transfer
 554                 if (NULL != info)
 555                 {
 556                     CAResult_t res = CAAddBlockOption(&pdu, info,
 557                                                       data->remoteEndpoint,
 558                                                       &options);
 559                     if (CA_STATUS_OK != res)
 560                     {
 561                         OIC_LOG(INFO, TAG, "to write block option has failed");
 562                         CAErrorHandler(data->remoteEndpoint, pdu->transport_hdr, pdu->length, res);
 563                         coap_delete_list(options);
 564                         coap_delete_pdu(pdu);
 565                         return res;
 566                     }
 567                 }
 568             }
 569 #endif // WITH_BWT
 570             CALogPDUInfo(pdu, data->remoteEndpoint);
 571
 572             OIC_LOG_V(INFO, TAG, "CASendUnicastData type : %d", data->dataType);
 573             res = CASendUnicastData(data->remoteEndpoint, pdu->transport_hdr, pdu->length, data->dataType);
 574             if (CA_STATUS_OK != res)
 575             {
 576                 OIC_LOG_V(ERROR, TAG, "send failed:%d", res);
 577                 CAErrorHandler(data->remoteEndpoint, pdu->transport_hdr, pdu->length, res);
 578                 coap_delete_list(options);
 579                 coap_delete_pdu(pdu);
 580                 return res;
 581             }
 582
 583 #ifdef WITH_TCP
 584             if (CAIsSupportedCoAPOverTCP(data->remoteEndpoint->adapter))
 585             {
 586                 OIC_LOG(INFO, TAG, "retransmission will be not worked");
 587             }
 588             else
 589 #endif
 590 #ifdef ROUTING_GATEWAY
 591             if(!skipRetransmission)
 592 #endif
 593             {
 594                 // for retransmission
 595                 res = CARetransmissionSentData(&g_retransmissionContext,
 596                                                data->remoteEndpoint,
 597                                                data->dataType,
 598                                                pdu->transport_hdr, pdu->length);
 599                 if ((CA_STATUS_OK != res) && (CA_NOT_SUPPORTED != res))
 600                 {
 601                     //when retransmission not supported this will return CA_NOT_SUPPORTED, ignore
 602                     OIC_LOG_V(INFO, TAG, "retransmission is not enabled due to error, res : %d", res);
 603                     coap_delete_list(options);
 604                     coap_delete_pdu(pdu);
 605                     return res;
 606                 }
 607             }
 608
 609             coap_delete_list(options);
 610             coap_delete_pdu(pdu);
 611         }
 612         else
 613         {
 614             OIC_LOG(ERROR,TAG,"Failed to generate unicast PDU");
 615             CASendErrorInfo(data->remoteEndpoint, info, CA_SEND_FAILED);
 616             return CA_SEND_FAILED;
 617         }
 618     }
 619     else if (SEND_TYPE_MULTICAST == type)
 620     {
 621         OIC_LOG(DEBUG,TAG,"Multicast message");
 622 #ifdef WITH_TCP
 623         /*
 624          * If CoAP over TCP is enabled, the CoAP pdu wont be same for IP and other adapters.
 625          * That's why we need to generate two pdu's, one for IP and second for other transports.
 626          * Two possible cases we might have to split: a) when adapter is CA_DEFAULT_ADAPTER
 627          * b) when one of the adapter is IP adapter(ex: CA_ADAPTER_IP | CA_ADAPTER_GATT_BTLE)
 628          */
 629         if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER ||
 630                 (CA_ADAPTER_IP & data->remoteEndpoint->adapter &&
 631                     CA_ADAPTER_IP != data->remoteEndpoint->adapter))
 632         {
 633             if (data->remoteEndpoint->adapter == CA_DEFAULT_ADAPTER)
 634             {
 635                 data->remoteEndpoint->adapter = CA_ALL_ADAPTERS ^ CA_ADAPTER_IP;
 636             }
 637             else
 638             {
 639                 data->remoteEndpoint->adapter = data->remoteEndpoint->adapter ^ CA_ADAPTER_IP;
 640             }
 641             CAProcessMulticastData(data);
 642             data->remoteEndpoint->adapter = CA_ADAPTER_IP;
 643             CAProcessMulticastData(data);
 644         }
 645         else
 646         {
 647             CAProcessMulticastData(data);
 648         }
 649 #else
 650         CAProcessMulticastData(data);
 651 #endif
 652     }
 653
 654     return CA_STATUS_OK;
 655 }
 656
 657 #ifndef SINGLE_THREAD
 658 static void CASendThreadProcess(void *threadData)
 659 {
 660     CAData_t *data = (CAData_t *) threadData;
 661     CAProcessSendData(data);
 662 }
 663 #endif
 664
 665 /*
 666  * If a second message arrives with the same message ID, token and the other address
 667  * family, drop it.  Typically, IPv6 beats IPv4, so the IPv4 message is dropped.
 668  */
 669 static bool CADropSecondMessage(CAHistory_t *history, const CAEndpoint_t *ep, uint16_t id,
 670                                 CAToken_t token, uint8_t tokenLength)
 671 {
 672     if (!ep)
 673     {
 674         return true;
 675     }
 676     if (ep->adapter != CA_ADAPTER_IP)
 677     {
 678         return false;
 679     }
 680     if (!caglobals.ip.dualstack)
 681     {
 682         return false;
 683     }
 684
 685     if (tokenLength > CA_MAX_TOKEN_LEN)
 686     {
 687         /*
 688          * If token length is more than CA_MAX_TOKEN_LEN,
 689          * we compare the first CA_MAX_TOKEN_LEN bytes only.
 690          */
 691         tokenLength = CA_MAX_TOKEN_LEN;
 692     }
 693
 694     bool ret = false;
 695     CATransportFlags_t familyFlags = ep->flags & CA_IPFAMILY_MASK;
 696
 697     for (size_t i = 0; i < sizeof(history->items) / sizeof(history->items[0]); i++)
 698     {
 699         CAHistoryItem_t *item = &(history->items[i]);
 700         if (id == item->messageId && tokenLength == item->tokenLength
 701             && memcmp(item->token, token, tokenLength) == 0)
 702         {
 703             if ((familyFlags ^ item->flags) == CA_IPFAMILY_MASK)
 704             {
 705                 OIC_LOG_V(INFO, TAG, "IPv%c duplicate message ignored",
 706                           familyFlags & CA_IPV6 ? '6' : '4');
 707                 ret = true;
 708                 break;
 709             }
 710         }
 711     }
 712
 713     history->items[history->nextIndex].flags = familyFlags;
 714     history->items[history->nextIndex].messageId = id;
 715     if (token && tokenLength)
 716     {
 717         memcpy(history->items[history->nextIndex].token, token, tokenLength);
 718         history->items[history->nextIndex].tokenLength = tokenLength;
 719     }
 720
 721     if (++history->nextIndex >= HISTORYSIZE)
 722     {
 723         history->nextIndex = 0;
 724     }
 725
 726     return ret;
 727 }
 728
 729 static void CAReceivedPacketCallback(const CASecureEndpoint_t *sep,
 730                                      const void *data, uint32_t dataLen)
 731 {
 732     VERIFY_NON_NULL_VOID(sep, TAG, "remoteEndpoint");
 733     VERIFY_NON_NULL_VOID(data, TAG, "data");
 734
 735     OIC_LOG(DEBUG, TAG, "received pdu data :");
 736     OIC_LOG_BUFFER(DEBUG, TAG,  data, dataLen);
 737
 738     uint32_t code = CA_NOT_FOUND;
 739     CAData_t *cadata = NULL;
 740
 741     coap_pdu_t *pdu = (coap_pdu_t *) CAParsePDU((const char *) data, dataLen, &code,
 742                                                 &(sep->endpoint));
 743     if (NULL == pdu)
 744     {
 745         OIC_LOG(ERROR, TAG, "Parse PDU failed");
 746         return;
 747     }
 748
 749     OIC_LOG_V(DEBUG, TAG, "code = %d", code);
 750     if (CA_GET == code || CA_POST == code || CA_PUT == code || CA_DELETE == code)
 751     {
 752         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_REQUEST_DATA);
 753         if (!cadata)
 754         {
 755             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 756             coap_delete_pdu(pdu);
 757             return;
 758         }
 759     }
 760     else
 761     {
 762         cadata = CAGenerateHandlerData(&(sep->endpoint), &(sep->identity), pdu, CA_RESPONSE_DATA);
 763         if (!cadata)
 764         {
 765             OIC_LOG(ERROR, TAG, "CAReceivedPacketCallback, CAGenerateHandlerData failed!");
 766             coap_delete_pdu(pdu);
 767             return;
 768         }
 769
 770 #ifdef WITH_TCP
 771         if (CAIsSupportedCoAPOverTCP(sep->endpoint.adapter))
 772         {
 773             OIC_LOG(INFO, TAG, "retransmission is not supported");
 774         }
 775         else
 776 #endif
 777         {
 778             // for retransmission
 779             void *retransmissionPdu = NULL;
 780             CARetransmissionReceivedData(&g_retransmissionContext, cadata->remoteEndpoint, pdu->transport_hdr,
 781                                          pdu->length, &retransmissionPdu);
 782
 783             // get token from saved data in retransmission list
 784             if (retransmissionPdu && CA_EMPTY == code)
 785             {
 786                 if (cadata->responseInfo)
 787                 {
 788                     CAInfo_t *info = &cadata->responseInfo->info;
 789                     CAResult_t res = CAGetTokenFromPDU((const coap_hdr_transport_t *)retransmissionPdu,
 790                                                        info, &(sep->endpoint));
 791                     if (CA_STATUS_OK != res)
 792                     {
 793                         OIC_LOG(ERROR, TAG, "fail to get Token from retransmission list");
 794                         OICFree(info->token);
 795                         info->tokenLength = 0;
 796                     }
 797                 }
 798             }
 799             OICFree(retransmissionPdu);
 800         }
 801     }
 802
 803     cadata->type = SEND_TYPE_UNICAST;
 804
 805 #ifdef SINGLE_THREAD
 806     CAProcessReceivedData(cadata);
 807 #else
 808 #ifdef WITH_BWT
 809     if (CAIsSupportedBlockwiseTransfer(sep->endpoint.adapter))
 810     {
 811         CAResult_t res = CAReceiveBlockWiseData(pdu, &(sep->endpoint), cadata, dataLen);
 812         if (CA_NOT_SUPPORTED == res || CA_REQUEST_TIMEOUT == res)
 813         {
 814             OIC_LOG(DEBUG, TAG, "this message does not have block option");
 815             CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 816         }
 817         else
 818         {
 819             CADestroyData(cadata, sizeof(CAData_t));
 820         }
 821     }
 822     else
 823 #endif
 824     {
 825         CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
 826     }
 827 #endif // SINGLE_THREAD
 828
 829     coap_delete_pdu(pdu);
 830 }
 831
 832 void CAHandleRequestResponseCallbacks()
 833 {
 834 #ifdef SINGLE_THREAD
 835     CAReadData();
 836     CARetransmissionBaseRoutine((void *)&g_retransmissionContext);
 837 #else
 838 #ifdef SINGLE_HANDLE
 839     // parse the data and call the callbacks.
 840     // #1 parse the data
 841     // #2 get endpoint
 842
 843     ca_mutex_lock(g_receiveThread.threadMutex);
 844
 845     u_queue_message_t *item = u_queue_get_element(g_receiveThread.dataQueue);
 846
 847     ca_mutex_unlock(g_receiveThread.threadMutex);
 848
 849     if (NULL == item || NULL == item->msg)
 850     {
 851         return;
 852     }
 853
 854     // get endpoint
 855     CAData_t *td = (CAData_t *) item->msg;
 856
 857     if (td->requestInfo && g_requestHandler)
 858     {
 859         OIC_LOG_V(DEBUG, TAG, "request callback : %d", td->requestInfo->info.numOptions);
 860         g_requestHandler(td->remoteEndpoint, td->requestInfo);
 861     }
 862     else if (td->responseInfo && g_responseHandler)
 863     {
 864         OIC_LOG_V(DEBUG, TAG, "response callback : %d", td->responseInfo->info.numOptions);
 865         g_responseHandler(td->remoteEndpoint, td->responseInfo);
 866     }
 867     else if (td->errorInfo && g_errorHandler)
 868     {
 869         OIC_LOG_V(DEBUG, TAG, "error callback error: %d", td->errorInfo->result);
 870         g_errorHandler(td->remoteEndpoint, td->errorInfo);
 871     }
 872
 873     CADestroyData(item->msg, sizeof(CAData_t));
 874     OICFree(item);
 875
 876 #endif // SINGLE_HANDLE
 877 #endif // SINGLE_THREAD
 878 }
 879
 880 static CAData_t* CAPrepareSendData(const CAEndpoint_t *endpoint, const void *sendData,
 881                                    CADataType_t dataType)
 882 {
 883     OIC_LOG(DEBUG, TAG, "CAPrepareSendData IN");
 884
 885     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
 886     if (!cadata)
 887     {
 888         OIC_LOG(ERROR, TAG, "memory allocation failed");
 889         return NULL;
 890     }
 891
 892     if (CA_REQUEST_DATA == dataType)
 893     {
 894 #ifdef SINGLE_THREAD
 895         CARequestInfo_t *request = (CARequestInfo_t *)sendData;
 896 #else
 897         // clone request info
 898         CARequestInfo_t *request = CACloneRequestInfo((CARequestInfo_t *)sendData);
 899         if (!request)
 900         {
 901             OIC_LOG(ERROR, TAG, "CACloneRequestInfo failed");
 902             goto exit;
 903         }
 904 #endif
 905         cadata->type = request->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 906         cadata->requestInfo =  request;
 907     }
 908     else if (CA_RESPONSE_DATA == dataType || CA_RESPONSE_FOR_RES == dataType)
 909     {
 910 #ifdef SINGLE_THREAD
 911         CAResponseInfo_t *response = (CAResponseInfo_t *)sendData;
 912 #else
 913         // clone response info
 914         CAResponseInfo_t *response = CACloneResponseInfo((CAResponseInfo_t *)sendData);
 915         if(!response)
 916         {
 917             OIC_LOG(ERROR, TAG, "CACloneResponseInfo failed");
 918             goto exit;
 919         }
 920 #endif
 921         cadata->type = response->isMulticast ? SEND_TYPE_MULTICAST : SEND_TYPE_UNICAST;
 922         cadata->responseInfo = response;
 923     }
 924     else
 925     {
 926         OIC_LOG(ERROR, TAG, "CAPrepareSendData unknown data type");
 927         goto exit;
 928     }
 929
 930 #ifdef SINGLE_THREAD
 931     CAEndpoint_t* ep = endpoint;
 932 #else
 933     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
 934     if (!ep)
 935     {
 936         OIC_LOG(ERROR, TAG, "endpoint clone failed");
 937         goto exit;
 938     }
 939 #endif
 940     cadata->remoteEndpoint = ep;
 941     cadata->dataType = dataType;
 942     return cadata;
 943
 944 exit:
 945 #ifndef SINGLE_THREAD
 946     CADestroyData(cadata, sizeof(CAData_t));
 947 #else
 948     OICFree(cadata);
 949 #endif
 950     return NULL;
 951 }
 952
 953 CAResult_t CADetachSendMessage(const CAEndpoint_t *endpoint, const void *sendMsg,
 954                                CADataType_t dataType)
 955 {
 956     VERIFY_NON_NULL(endpoint, TAG, "endpoint");
 957     VERIFY_NON_NULL(sendMsg, TAG, "sendMsg");
 958
 959     if (false == CAIsSelectedNetworkAvailable())
 960     {
 961         return CA_STATUS_FAILED;
 962     }
 963
 964 #ifdef ARDUINO
 965     // If max retransmission queue is reached, then don't handle new request
 966     if (CA_MAX_RT_ARRAY_SIZE == u_arraylist_length(g_retransmissionContext.dataList))
 967     {
 968         OIC_LOG(ERROR, TAG, "max RT queue size reached!");
 969         return CA_SEND_FAILED;
 970     }
 971 #endif // ARDUINO
 972
 973     CAData_t *data = CAPrepareSendData(endpoint, sendMsg, dataType);
 974     if(!data)
 975     {
 976         OIC_LOG(ERROR, TAG, "CAPrepareSendData failed");
 977         return CA_MEMORY_ALLOC_FAILED;
 978     }
 979
 980 #ifdef SINGLE_THREAD
 981     CAResult_t result = CAProcessSendData(data);
 982     if (CA_STATUS_OK != result)
 983     {
 984         OIC_LOG(ERROR, TAG, "CAProcessSendData failed");
 985         OICFree(data);
 986         return result;
 987     }
 988
 989     OICFree(data);
 990
 991 #else
 992 #ifdef WITH_BWT
 993     if (CAIsSupportedBlockwiseTransfer(endpoint->adapter))
 994     {
 995         // send block data
 996         CAResult_t res = CASendBlockWiseData(data);
 997         if (CA_NOT_SUPPORTED == res)
 998         {
 999             OIC_LOG(DEBUG, TAG, "normal msg will be sent");
1000             CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1001             return CA_STATUS_OK;
1002         }
1003         else
1004         {
1005             CADestroyData(data, sizeof(CAData_t));
1006         }
1007         return res;
1008     }
1009     else
1010 #endif // WITH_BWT
1011     {
1012         CAQueueingThreadAddData(&g_sendThread, data, sizeof(CAData_t));
1013     }
1014 #endif // SINGLE_THREAD
1015
1016     return CA_STATUS_OK;
1017 }
1018
1019 void CASetInterfaceCallbacks(CARequestCallback ReqHandler, CAResponseCallback RespHandler,
1020                              CAErrorCallback errorHandler)
1021 {
1022     g_requestHandler = ReqHandler;
1023     g_responseHandler = RespHandler;
1024     g_errorHandler = errorHandler;
1025 }
1026
1027 void CASetNetworkMonitorCallback(CANetworkMonitorCallback nwMonitorHandler)
1028 {
1029     g_nwMonitorHandler = nwMonitorHandler;
1030 }
1031
1032 CAResult_t CAInitializeMessageHandler()
1033 {
1034     CASetPacketReceivedCallback(CAReceivedPacketCallback);
1035     CASetErrorHandleCallback(CAErrorHandler);
1036
1037 #ifndef SINGLE_THREAD
1038     // create thread pool
1039     CAResult_t res = ca_thread_pool_init(MAX_THREAD_POOL_SIZE, &g_threadPoolHandle);
1040     if (CA_STATUS_OK != res)
1041     {
1042         OIC_LOG(ERROR, TAG, "thread pool initialize error.");
1043         return res;
1044     }
1045
1046     // send thread initialize
1047     res = CAQueueingThreadInitialize(&g_sendThread, g_threadPoolHandle,
1048                                      CASendThreadProcess, CADestroyData);
1049     if (CA_STATUS_OK != res)
1050     {
1051         OIC_LOG(ERROR, TAG, "Failed to Initialize send queue thread");
1052         ca_thread_pool_free(g_threadPoolHandle);
1053         g_threadPoolHandle = NULL;
1054         return res;
1055     }
1056
1057     // start send thread
1058     res = CAQueueingThreadStart(&g_sendThread);
1059     if (CA_STATUS_OK != res)
1060     {
1061         OIC_LOG(ERROR, TAG, "thread start error(send thread).");
1062         ca_thread_pool_free(g_threadPoolHandle);
1063         g_threadPoolHandle = NULL;
1064         CAQueueingThreadDestroy(&g_sendThread);
1065         return res;
1066     }
1067
1068     // receive thread initialize
1069     res = CAQueueingThreadInitialize(&g_receiveThread, g_threadPoolHandle,
1070                                      CAReceiveThreadProcess, CADestroyData);
1071     if (CA_STATUS_OK != res)
1072     {
1073         OIC_LOG(ERROR, TAG, "Failed to Initialize receive queue thread");
1074         ca_thread_pool_free(g_threadPoolHandle);
1075         g_threadPoolHandle = NULL;
1076         CAQueueingThreadDestroy(&g_sendThread);
1077         return res;
1078     }
1079
1080 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1081     // start receive thread
1082     res = CAQueueingThreadStart(&g_receiveThread);
1083     if (CA_STATUS_OK != res)
1084     {
1085         OIC_LOG(ERROR, TAG, "thread start error(receive thread).");
1086         ca_thread_pool_free(g_threadPoolHandle);
1087         g_threadPoolHandle = NULL;
1088         CAQueueingThreadDestroy(&g_sendThread);
1089         CAQueueingThreadDestroy(&g_receiveThread);
1090         return res;
1091     }
1092 #endif // SINGLE_HANDLE
1093
1094     // retransmission initialize
1095     res = CARetransmissionInitialize(&g_retransmissionContext, g_threadPoolHandle,
1096                                      CASendUnicastData, CATimeoutCallback, NULL);
1097     if (CA_STATUS_OK != res)
1098     {
1099         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1100         ca_thread_pool_free(g_threadPoolHandle);
1101         g_threadPoolHandle = NULL;
1102         CAQueueingThreadDestroy(&g_sendThread);
1103         CAQueueingThreadDestroy(&g_receiveThread);
1104         return res;
1105     }
1106
1107 #ifdef WITH_BWT
1108     // block-wise transfer initialize
1109     res = CAInitializeBlockWiseTransfer(CAAddDataToSendThread, CAAddDataToReceiveThread);
1110     if (CA_STATUS_OK != res)
1111     {
1112         OIC_LOG(ERROR, TAG, "Failed to Initialize BlockWiseTransfer.");
1113         ca_thread_pool_free(g_threadPoolHandle);
1114         g_threadPoolHandle = NULL;
1115         CAQueueingThreadDestroy(&g_sendThread);
1116         CAQueueingThreadDestroy(&g_receiveThread);
1117         CARetransmissionDestroy(&g_retransmissionContext);
1118         return res;
1119     }
1120 #endif
1121
1122     // start retransmission
1123     res = CARetransmissionStart(&g_retransmissionContext);
1124     if (CA_STATUS_OK != res)
1125     {
1126         OIC_LOG(ERROR, TAG, "thread start error(retransmission thread).");
1127         ca_thread_pool_free(g_threadPoolHandle);
1128         g_threadPoolHandle = NULL;
1129         CAQueueingThreadDestroy(&g_sendThread);
1130         CAQueueingThreadDestroy(&g_receiveThread);
1131         CARetransmissionDestroy(&g_retransmissionContext);
1132         return res;
1133     }
1134
1135     // initialize interface adapters by controller
1136     CAInitializeAdapters(g_threadPoolHandle);
1137 #else
1138     // retransmission initialize
1139     CAResult_t res = CARetransmissionInitialize(&g_retransmissionContext, NULL, CASendUnicastData,
1140                                                 CATimeoutCallback, NULL);
1141     if (CA_STATUS_OK != res)
1142     {
1143         OIC_LOG(ERROR, TAG, "Failed to Initialize Retransmission.");
1144         return res;
1145     }
1146
1147     CAInitializeAdapters();
1148 #endif // SINGLE_THREAD
1149
1150     return CA_STATUS_OK;
1151 }
1152
1153 void CATerminateMessageHandler()
1154 {
1155 #ifndef SINGLE_THREAD
1156     CATransportAdapter_t connType;
1157     u_arraylist_t *list = CAGetSelectedNetworkList();
1158     uint32_t length = u_arraylist_length(list);
1159
1160     uint32_t i = 0;
1161     for (i = 0; i < length; i++)
1162     {
1163         void* ptrType = u_arraylist_get(list, i);
1164
1165         if (NULL == ptrType)
1166         {
1167             continue;
1168         }
1169
1170         connType = *(CATransportAdapter_t *)ptrType;
1171         CAStopAdapter(connType);
1172     }
1173
1174     // stop retransmission
1175     if (NULL != g_retransmissionContext.threadMutex)
1176     {
1177         CARetransmissionStop(&g_retransmissionContext);
1178     }
1179
1180     // stop thread
1181     // delete thread data
1182     if (NULL != g_sendThread.threadMutex)
1183     {
1184         CAQueueingThreadStop(&g_sendThread);
1185     }
1186
1187     // stop thread
1188     // delete thread data
1189     if (NULL != g_receiveThread.threadMutex)
1190     {
1191 #ifndef SINGLE_HANDLE // This will be enabled when RI supports multi threading
1192         CAQueueingThreadStop(&g_receiveThread);
1193 #endif
1194     }
1195
1196     // destroy thread pool
1197     if (NULL != g_threadPoolHandle)
1198     {
1199         ca_thread_pool_free(g_threadPoolHandle);
1200         g_threadPoolHandle = NULL;
1201     }
1202
1203 #ifdef WITH_BWT
1204     CATerminateBlockWiseTransfer();
1205 #endif
1206     CARetransmissionDestroy(&g_retransmissionContext);
1207     CAQueueingThreadDestroy(&g_sendThread);
1208     CAQueueingThreadDestroy(&g_receiveThread);
1209
1210     // terminate interface adapters by controller
1211     CATerminateAdapters();
1212 #else
1213     // terminate interface adapters by controller
1214     CATerminateAdapters();
1215
1216     // stop retransmission
1217     CARetransmissionStop(&g_retransmissionContext);
1218     CARetransmissionDestroy(&g_retransmissionContext);
1219 #endif // SINGLE_THREAD
1220 }
1221
1222 void CALogPDUInfo(coap_pdu_t *pdu, const CAEndpoint_t *endpoint)
1223 {
1224     VERIFY_NON_NULL_VOID(pdu, TAG, "pdu");
1225     VERIFY_NON_NULL_VOID(endpoint, TAG, "endpoint");
1226
1227     OIC_LOG_V(DEBUG, TAG, "PDU Maker - payload : %s", pdu->data);
1228
1229 #ifdef WITH_TCP
1230     if (CAIsSupportedCoAPOverTCP(endpoint->adapter))
1231     {
1232         OIC_LOG(DEBUG, TAG, "pdu header data :");
1233         OIC_LOG_BUFFER(DEBUG, TAG,  (const uint8_t *) pdu->transport_hdr, pdu->length);
1234     }
1235     else
1236 #endif
1237     {
1238         OIC_LOG_V(DEBUG, TAG, "PDU Maker - type : %d", pdu->transport_hdr->udp.type);
1239
1240         OIC_LOG_V(DEBUG, TAG, "PDU Maker - code : %d", pdu->transport_hdr->udp.code);
1241
1242         OIC_LOG(DEBUG, TAG, "PDU Maker - token :");
1243
1244         OIC_LOG_BUFFER(DEBUG, TAG, pdu->transport_hdr->udp.token,
1245                        pdu->transport_hdr->udp.token_length);
1246     }
1247 }
1248
1249 static void CALogPayloadInfo(CAInfo_t *info)
1250 {
1251     if (info)
1252     {
1253         if (info->options)
1254         {
1255             for (uint32_t i = 0; i < info->numOptions; i++)
1256             {
1257                 OIC_LOG_V(DEBUG, TAG, "optionID: %u", info->options[i].optionID);
1258
1259                 OIC_LOG_V(DEBUG, TAG, "list: %s", info->options[i].optionData);
1260             }
1261         }
1262
1263         if (info->payload)
1264         {
1265             OIC_LOG_V(DEBUG, TAG, "payload: %p(%zu)", info->payload,
1266                       info->payloadSize);
1267         }
1268
1269         if (info->token)
1270         {
1271             OIC_LOG(DEBUG, TAG, "token:");
1272             OIC_LOG_BUFFER(DEBUG, TAG, (const uint8_t *) info->token,
1273                            info->tokenLength);
1274         }
1275         OIC_LOG_V(DEBUG, TAG, "msgID: %u", info->messageId);
1276     }
1277     else
1278     {
1279         OIC_LOG(DEBUG, TAG, "info is NULL, cannot output log data");
1280     }
1281 }
1282
1283 void CAErrorHandler(const CAEndpoint_t *endpoint,
1284                     const void *data, uint32_t dataLen,
1285                     CAResult_t result)
1286 {
1287     OIC_LOG(DEBUG, TAG, "CAErrorHandler IN");
1288
1289 #ifndef SINGLE_THREAD
1290     VERIFY_NON_NULL_VOID(endpoint, TAG, "remoteEndpoint");
1291     VERIFY_NON_NULL_VOID(data, TAG, "data");
1292
1293     uint32_t code = CA_NOT_FOUND;
1294     //Do not free remoteEndpoint and data. Currently they will be freed in data thread
1295     //Get PDU data
1296     coap_pdu_t *pdu = (coap_pdu_t *)CAParsePDU((const char *)data, dataLen, &code, endpoint);
1297     if (NULL == pdu)
1298     {
1299         OIC_LOG(ERROR, TAG, "Parse PDU failed");
1300         return;
1301     }
1302
1303     CAData_t *cadata = CAGenerateHandlerData(endpoint, NULL, pdu, CA_ERROR_DATA);
1304     if (!cadata)
1305     {
1306         OIC_LOG(ERROR, TAG, "CAErrorHandler, CAGenerateHandlerData failed!");
1307         coap_delete_pdu(pdu);
1308         return;
1309     }
1310
1311     cadata->errorInfo->result = result;
1312
1313     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1314     coap_delete_pdu(pdu);
1315 #endif
1316
1317     OIC_LOG(DEBUG, TAG, "CAErrorHandler OUT");
1318     return;
1319 }
1320
1321 static void CASendErrorInfo(const CAEndpoint_t *endpoint, const CAInfo_t *info, CAResult_t result)
1322 {
1323     OIC_LOG(DEBUG, TAG, "CASendErrorInfo IN");
1324 #ifndef SINGLE_THREAD
1325     CAData_t *cadata = (CAData_t *) OICCalloc(1, sizeof(CAData_t));
1326     if (!cadata)
1327     {
1328         OIC_LOG(ERROR, TAG, "cadata memory allocation failed");
1329         return;
1330     }
1331
1332     CAEndpoint_t* ep = CACloneEndpoint(endpoint);
1333     if (!ep)
1334     {
1335         OIC_LOG(ERROR, TAG, "endpoint clone failed");
1336         OICFree(cadata);
1337         return;
1338     }
1339
1340     CAErrorInfo_t *errorInfo = (CAErrorInfo_t *)OICCalloc(1, sizeof (CAErrorInfo_t));
1341     if (!errorInfo)
1342     {
1343         OIC_LOG(ERROR, TAG, "errorInfo memory allocation failed");
1344         OICFree(cadata);
1345         CAFreeEndpoint(ep);
1346         return;
1347     }
1348
1349     CAResult_t res = CACloneInfo(info, &errorInfo->info);
1350     if (CA_STATUS_OK != res)
1351     {
1352         OIC_LOG(ERROR, TAG, "info clone failed");
1353         OICFree(cadata);
1354         OICFree(errorInfo);
1355         CAFreeEndpoint(ep);
1356         return;
1357     }
1358
1359     errorInfo->result = result;
1360     cadata->remoteEndpoint = ep;
1361     cadata->errorInfo = errorInfo;
1362     cadata->dataType = CA_ERROR_DATA;
1363
1364     CAQueueingThreadAddData(&g_receiveThread, cadata, sizeof(CAData_t));
1365 #endif
1366     OIC_LOG(DEBUG, TAG, "CASendErrorInfo OUT");
1367 }